1 #define PERL_NO_GET_CONTEXT
11 struct _PerlIO base; /* Base "class" info */
40 #define MYMethod(x) #x,&s->x
43 PerlIOVia_fetchmethod(pTHX_ PerlIOVia *s,char *method,CV **save)
45 GV *gv = gv_fetchmeth(s->stash,method,strlen(method),0);
47 Perl_warn(aTHX_ "Lookup %s::%s => %p",HvNAME(s->stash),method,gv);
51 return *save = GvCV(gv);
55 return *save = (CV *) -1;
61 PerlIOVia_method(pTHX_ PerlIO *f,char *method,CV **save,int flags,...)
63 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
64 CV *cv = (*save) ? *save : PerlIOVia_fetchmethod(aTHX_ s,method,save);
77 while ((arg = va_arg(ap,SV *)))
85 GV *gv = newGVgen(HvNAME(s->stash));
87 s->fh = newRV_noinc((SV *)gv);
90 IoIFP(s->io) = PerlIONext(f);
91 IoOFP(s->io) = PerlIONext(f);
95 count = call_sv((SV *)cv,flags);
104 result = &PL_sv_undef;
113 PerlIOVia_pushed(PerlIO *f, const char *mode, SV *arg)
115 IV code = PerlIOBase_pushed(f,mode,Nullsv);
119 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
122 Perl_warn(aTHX_ "No package specified");
128 char *pkg = SvPV(arg,pkglen);
130 s->stash = gv_stashpvn(pkg, pkglen, FALSE);
133 SV *modesv = (mode) ? sv_2mortal(newSVpvn(mode,strlen(mode))) : Nullsv;
134 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(PUSHED),G_SCALAR,modesv,Nullsv);
137 if (sv_isobject(result))
138 s->obj = SvREFCNT_inc(result);
139 else if (SvIV(result) != 0)
142 if (PerlIOVia_fetchmethod(aTHX_ s,MYMethod(FILL)) == (CV *) -1)
143 PerlIOBase(f)->flags &= ~PERLIO_F_FASTGETS;
145 PerlIOBase(f)->flags |= PERLIO_F_FASTGETS;
149 Perl_warn(aTHX_ "Cannot find package '%.*s'",(int) pkglen,pkg);
158 PerlIOVia_open(pTHX_ PerlIO_funcs *self, AV *layers, IV n, const char *mode, int fd, int imode, int perm, PerlIO *f, int narg, SV **args)
162 f = PerlIO_push(aTHX_ PerlIO_allocate(aTHX),self,mode,PerlIOArg);
166 if (!PerlIO_push(aTHX_ f,self,mode,PerlIOArg))
171 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
175 SV *fdsv = sv_2mortal(newSViv(fd));
176 result = PerlIOVia_method(aTHX_ f,MYMethod(FDOPEN),G_SCALAR,fdsv,Nullsv);
182 SV *imodesv = sv_2mortal(newSViv(imode));
183 SV *permsv = sv_2mortal(newSViv(perm));
184 result = PerlIOVia_method(aTHX_ f,MYMethod(SYSOPEN),G_SCALAR,*args,imodesv,permsv,Nullsv);
188 result = PerlIOVia_method(aTHX_ f,MYMethod(OPEN),G_SCALAR,*args,Nullsv);
193 if (sv_isobject(result))
194 s->obj = SvREFCNT_inc(result);
195 else if (!SvTRUE(result))
207 PerlIOVia_popped(PerlIO *f)
210 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
211 PerlIOVia_method(aTHX_ f,MYMethod(POPPED),G_VOID,Nullsv);
214 SvREFCNT_dec(s->var);
231 SvREFCNT_dec(s->obj);
238 PerlIOVia_close(PerlIO *f)
241 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
242 IV code = PerlIOBase_close(f);
243 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(CLOSE),G_SCALAR,Nullsv);
244 if (result && SvIV(result) != 0)
246 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF|PERLIO_F_WRBUF);
251 PerlIOVia_fileno(PerlIO *f)
254 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
255 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(FILENO),G_SCALAR,Nullsv);
256 return (result) ? SvIV(result) : PerlIO_fileno(PerlIONext(f));
260 PerlIOVia_seek(PerlIO *f, Off_t offset, int whence)
263 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
264 SV *offsv = sv_2mortal(newSViv(offset));
265 SV *whsv = sv_2mortal(newSViv(offset));
266 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(SEEK),G_SCALAR,offsv,whsv,Nullsv);
267 return (result) ? SvIV(result) : -1;
271 PerlIOVia_tell(PerlIO *f)
274 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
275 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(TELL),G_SCALAR,Nullsv);
276 return (result) ? (Off_t) SvIV(result) : s->posn;
280 PerlIOVia_unread(PerlIO *f, const void *vbuf, Size_t count)
283 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
284 SV *buf = sv_2mortal(newSVpvn((char *)vbuf,count));
285 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(UNREAD),G_SCALAR,buf,Nullsv);
287 return (SSize_t) SvIV(result);
290 return PerlIOBase_unread(f,vbuf,count);
295 PerlIOVia_read(PerlIO *f, void *vbuf, Size_t count)
298 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD)
300 if (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)
302 rd = PerlIOBase_read(f,vbuf,count);
307 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
308 SV *buf = sv_2mortal(newSV(count));
309 SV *n = sv_2mortal(newSViv(count));
310 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(READ),G_SCALAR,buf,n,Nullsv);
313 rd = (SSize_t) SvIV(result);
314 Move(SvPVX(buf),vbuf,rd,char);
323 PerlIOVia_write(PerlIO *f, const void *vbuf, Size_t count)
325 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE)
328 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
329 SV *buf = newSVpvn((char *)vbuf,count);
330 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(WRITE),G_SCALAR,buf,Nullsv);
333 return (SSize_t) SvIV(result);
340 PerlIOVia_fill(PerlIO *f)
342 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD)
345 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
346 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(FILL),G_SCALAR,Nullsv);
349 SvREFCNT_dec(s->var);
352 if (result && SvOK(result))
355 char *p = SvPV(result,len);
356 s->var = newSVpvn(p,len);
357 s->cnt = SvCUR(s->var);
361 PerlIOBase(f)->flags |= PERLIO_F_EOF;
367 PerlIOVia_flush(PerlIO *f)
370 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
371 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(FLUSH),G_SCALAR,Nullsv);
372 if (s->var && s->cnt > 0)
374 SvREFCNT_dec(s->var);
377 return (result) ? SvIV(result) : 0;
381 PerlIOVia_get_base(PerlIO *f)
383 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD)
386 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
389 return (STDCHAR *)SvPVX(s->var);
392 return (STDCHAR *) Nullch;
396 PerlIOVia_get_ptr(PerlIO *f)
398 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD)
400 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
404 STDCHAR *p = (STDCHAR *)(SvEND(s->var) - s->cnt);
408 return (STDCHAR *) Nullch;
412 PerlIOVia_get_cnt(PerlIO *f)
414 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD)
416 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
426 PerlIOVia_bufsiz(PerlIO *f)
428 if (PerlIOBase(f)->flags & PERLIO_F_CANREAD)
430 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
432 return SvCUR(s->var);
438 PerlIOVia_set_ptrcnt(PerlIO *f, STDCHAR *ptr, SSize_t cnt)
440 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
445 PerlIOVia_setlinebuf(PerlIO *f)
448 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
449 PerlIOVia_method(aTHX_ f,MYMethod(SETLINEBUF),G_VOID,Nullsv);
450 PerlIOBase_setlinebuf(f);
454 PerlIOVia_clearerr(PerlIO *f)
457 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
458 PerlIOVia_method(aTHX_ f,MYMethod(CLEARERR),G_VOID,Nullsv);
459 PerlIOBase_clearerr(f);
463 PerlIOVia_error(PerlIO *f)
466 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
467 SV *result = PerlIOVia_method(aTHX_ f,MYMethod(ERROR),G_SCALAR,Nullsv);
468 return (result) ? SvIV(result) : PerlIOBase_error(f);
472 PerlIOVia_getarg(PerlIO *f)
475 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
476 return PerlIOVia_method(aTHX_ f,MYMethod(GETARG),G_SCALAR,Nullsv);
480 PerlIOVia_eof(PerlIO *f)
483 PerlIOVia *s = PerlIOSelf(f,PerlIOVia);
484 SV *result = PerlIOVia_method(aTHX_ f,"EOF",&s->mEOF,G_SCALAR,Nullsv);
485 return (result) ? SvIV(result) : PerlIOBase_eof(f);
488 PerlIO_funcs PerlIO_object = {
491 PERLIO_K_BUFFERED|PERLIO_K_DESTRUCT,
494 NULL, /* PerlIOVia_open, */
508 PerlIOVia_setlinebuf,
513 PerlIOVia_set_ptrcnt,
517 #endif /* Layers available */
519 MODULE = PerlIO::Via PACKAGE = PerlIO::Via
525 PerlIO_define_layer(aTHX_ &PerlIO_object);